package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordEditFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();
        //MD5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void insert(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        // 调用Java提供给的工具类把类里面的相同名称属性拷贝过去
        BeanUtils.copyProperties(employeeDTO,employee);

        // 继续设置没有拷贝过来的属性的属性值
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        // 有了公共字段自动填充
       /* employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        // TODO:创建人id和修改人id设置为动态
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/


        employeeMapper.insert(employee);
    }

    @Override
    public PageResult list(EmployeePageQueryDTO employeePageQueryDTO) {
        int page = employeePageQueryDTO.getPage();
        int pageSize = employeePageQueryDTO.getPageSize();
        String name = employeePageQueryDTO.getName();
        PageHelper.startPage(page,pageSize);

        List<Employee> employees = employeeMapper.list(name);

        Page<Employee> p = (Page<Employee>)employees;

        PageResult pageResult = new PageResult(p.getTotal(),p.getResult());

        return pageResult;
    }

    @Override
    public void prohibit(String status, String id) {
        employeeMapper.prohibit(status,id);
    }

    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        return employee;
    }

    // TODO:输入的旧密码和数据库不匹配时抛出异常
    //解决：拿到存储在ThreadLocal里面的id值，根据ID值获取到真实的密码，和用户输入的进行对比
    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        // 用户输入的原密码
        String oldPassword = passwordEditDTO.getOldPassword();
        String newPassword = passwordEditDTO.getNewPassword();

        Long empId = BaseContext.getCurrentId();
        passwordEditDTO.setEmpId(empId);

        // 根据ID获取到数据库真实的加密后的原密码
        Employee employee = employeeMapper.getById(empId);
        String originPassword = employee.getPassword();
        oldPassword = DigestUtils.md5DigestAsHex(oldPassword.getBytes());

        // 进行对比，如果相同则更新，不同则抛出异常
        if (oldPassword.equals(originPassword)){
            // 加密
            passwordEditDTO.setNewPassword(DigestUtils.md5DigestAsHex(newPassword.getBytes()));
            employeeMapper.editPassword(passwordEditDTO);
        }else {
            throw new PasswordEditFailedException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }


}
